Home / 81,623.80-122,435.70-81,105.40

Finding the Fourth Proportional to 81,623.80, 122,435.70 and 81,105.40

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Solution

The fourth proportional to 81,623.80, 122,435.70 and 81,105.40 is: 121,658.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,623.80 : 122,435.70 = 81,105.40 : x
  2. Step 2: Convert to fraction form
    81,623.80/122,435.70 = 81,105.40/x
  3. Step 3: Cross multiply
    81,623.80x = 122,435.70 × 81,105.40
  4. Step 4: Simplify right side
    81,623.80x = 9,930,196,422.78
  5. Step 5: Solve for x
    x = 9,930,196,422.78/81,623.80
  6. Step 6: Final answer
    x = 121,658.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.